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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Benjamin Marzinski <bmarzins@redhat.com>
Date: Tue, 31 Jan 2023 12:00:31 -0600
Subject: [PATCH] libmultipath: keep renames from stopping other multipath
actions
If select_action() is called and a multipath device needs to be renamed,
the code currently checks if force_reload is set, and if so, does the
reload after the rename. But if force_reload isn't set, only the rename
happens, regardless of what other actions are needed. This can happen if
multipathd starts up and a device needs both a reload and a rename.
Make multipath check for resize, reload, and switch pathgroup along with
rename, and do both if necessary.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
---
libmultipath/configure.c | 62 +++++++++++++++++-----------------------
libmultipath/configure.h | 4 ++-
2 files changed, 30 insertions(+), 36 deletions(-)
diff --git a/libmultipath/configure.c b/libmultipath/configure.c
index 24d051dd..bbdbb8ca 100644
--- a/libmultipath/configure.c
+++ b/libmultipath/configure.c
@@ -714,7 +714,8 @@ static bool is_udev_ready(struct multipath *cmpp)
static void
select_reload_action(struct multipath *mpp, const char *reason)
{
- mpp->action = ACT_RELOAD;
+ mpp->action = mpp->action == ACT_RENAME ? ACT_RELOAD_RENAME :
+ ACT_RELOAD;
condlog(3, "%s: set ACT_RELOAD (%s)", mpp->alias, reason);
}
@@ -725,6 +726,7 @@ void select_action (struct multipath *mpp, const struct _vector *curmp,
struct multipath * cmpp_by_name;
char * mpp_feat, * cmpp_feat;
+ mpp->action = ACT_NOTHING;
cmpp = find_mp_by_wwid(curmp, mpp->wwid);
cmpp_by_name = find_mp_by_alias(curmp, mpp->alias);
@@ -747,14 +749,8 @@ void select_action (struct multipath *mpp, const struct _vector *curmp,
mpp->alias);
strlcpy(mpp->alias_old, cmpp->alias, WWID_SIZE);
mpp->action = ACT_RENAME;
- if (force_reload) {
- mpp->force_udev_reload = 1;
- mpp->action = ACT_FORCERENAME;
- }
- return;
- }
-
- if (cmpp != cmpp_by_name) {
+ /* don't return here. Check for other needed actions */
+ } else if (cmpp != cmpp_by_name) {
condlog(2, "%s: unable to rename %s to %s (%s is used by %s)",
mpp->wwid, cmpp->alias, mpp->alias,
mpp->alias, cmpp_by_name->wwid);
@@ -762,12 +758,13 @@ void select_action (struct multipath *mpp, const struct _vector *curmp,
FREE(mpp->alias);
mpp->alias = STRDUP(cmpp->alias);
mpp->action = ACT_IMPOSSIBLE;
- return;
+ /* don't return here. Check for other needed actions */
}
if (cmpp->size != mpp->size) {
mpp->force_udev_reload = 1;
- mpp->action = ACT_RESIZE;
+ mpp->action = mpp->action == ACT_RENAME ? ACT_RESIZE_RENAME :
+ ACT_RESIZE;
condlog(3, "%s: set ACT_RESIZE (size change)",
mpp->alias);
return;
@@ -843,14 +840,14 @@ void select_action (struct multipath *mpp, const struct _vector *curmp,
return;
}
if (cmpp->nextpg != mpp->bestpg) {
- mpp->action = ACT_SWITCHPG;
+ mpp->action = mpp->action == ACT_RENAME ? ACT_SWITCHPG_RENAME :
+ ACT_SWITCHPG;
condlog(3, "%s: set ACT_SWITCHPG (next path group change)",
mpp->alias);
return;
}
- mpp->action = ACT_NOTHING;
- condlog(3, "%s: set ACT_NOTHING (map unchanged)",
- mpp->alias);
+ if (mpp->action == ACT_NOTHING)
+ condlog(3, "%s: set ACT_NOTHING (map unchanged)", mpp->alias);
return;
}
@@ -951,6 +948,17 @@ int domap(struct multipath *mpp, char *params, int is_daemon)
}
}
+ if (mpp->action == ACT_RENAME || mpp->action == ACT_SWITCHPG_RENAME ||
+ mpp->action == ACT_RELOAD_RENAME ||
+ mpp->action == ACT_RESIZE_RENAME) {
+ conf = get_multipath_config();
+ pthread_cleanup_push(put_multipath_config, conf);
+ r = dm_rename(mpp->alias_old, mpp->alias,
+ conf->partition_delim, mpp->skip_kpartx);
+ pthread_cleanup_pop(1);
+ if (r == DOMAP_FAIL)
+ return r;
+ }
switch (mpp->action) {
case ACT_REJECT:
case ACT_NOTHING:
@@ -958,6 +966,7 @@ int domap(struct multipath *mpp, char *params, int is_daemon)
return DOMAP_EXIST;
case ACT_SWITCHPG:
+ case ACT_SWITCHPG_RENAME:
dm_switchgroup(mpp->alias, mpp->bestpg);
/*
* we may have avoided reinstating paths because there where in
@@ -984,6 +993,7 @@ int domap(struct multipath *mpp, char *params, int is_daemon)
break;
case ACT_RELOAD:
+ case ACT_RELOAD_RENAME:
sysfs_set_max_sectors_kb(mpp, 1);
if (mpp->ghost_delay_tick > 0 && pathcount(mpp, PATH_UP))
mpp->ghost_delay_tick = 0;
@@ -991,6 +1001,7 @@ int domap(struct multipath *mpp, char *params, int is_daemon)
break;
case ACT_RESIZE:
+ case ACT_RESIZE_RENAME:
sysfs_set_max_sectors_kb(mpp, 1);
if (mpp->ghost_delay_tick > 0 && pathcount(mpp, PATH_UP))
mpp->ghost_delay_tick = 0;
@@ -998,29 +1009,10 @@ int domap(struct multipath *mpp, char *params, int is_daemon)
break;
case ACT_RENAME:
- conf = get_multipath_config();
- pthread_cleanup_push(put_multipath_config, conf);
- r = dm_rename(mpp->alias_old, mpp->alias,
- conf->partition_delim, mpp->skip_kpartx);
- pthread_cleanup_pop(1);
- break;
-
- case ACT_FORCERENAME:
- conf = get_multipath_config();
- pthread_cleanup_push(put_multipath_config, conf);
- r = dm_rename(mpp->alias_old, mpp->alias,
- conf->partition_delim, mpp->skip_kpartx);
- pthread_cleanup_pop(1);
- if (r) {
- sysfs_set_max_sectors_kb(mpp, 1);
- if (mpp->ghost_delay_tick > 0 &&
- pathcount(mpp, PATH_UP))
- mpp->ghost_delay_tick = 0;
- r = dm_addmap_reload(mpp, params, 0);
- }
break;
default:
+ r = DOMAP_FAIL;
break;
}
diff --git a/libmultipath/configure.h b/libmultipath/configure.h
index 2bf73e65..9d935db3 100644
--- a/libmultipath/configure.h
+++ b/libmultipath/configure.h
@@ -18,9 +18,11 @@ enum actions {
ACT_RENAME,
ACT_CREATE,
ACT_RESIZE,
- ACT_FORCERENAME,
+ ACT_RELOAD_RENAME,
ACT_DRY_RUN,
ACT_IMPOSSIBLE,
+ ACT_RESIZE_RENAME,
+ ACT_SWITCHPG_RENAME,
};
/*
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